Is Coffee High In Oxalates? Should You Be Concerned?

The quantity of oxalate in coffee is becoming a major concern for coffee drinkers who are intolerant to oxalate. Is coffee high in oxalates? If yes, should these individuals give up drinking coffee? Keep scrolling down to find a satisfactory answer to this question.

Is Coffee High In Oxalates?

The short answer is No, coffee is not a high-oxalate drink. Ordinary coffee, even instant, has less than 3mg of oxalate in each cup. Instant coffee appears to have more oxalate per serving than traditional coffee. Therefore, contrary to what many websites and publications claim, coffee is quite low in oxalates. 

If you want to keep your oxalate consumption within a safe range, this is a major problem. It’s critical for us who drink several cups of coffee throughout the day to know the answer. 

Most of the information available on the internet concerning the oxalate content of any meal (not just coffee) is unreliable. 

Problems will arise in the record because of a mix of old or incorrect testing. Even high-quality studies rarely provide figures in units that nutritionists and consumers can understand.

For the time being, we’ll have to rely on what studies have found. No research has ever categorized coffee as an oxalate-rich beverage. Also, most medical institutes pointed out that coffee does not belong to the league of high-oxalate foods.

In fact, all major tests have pointed in the direction that coffee has a low oxalate content. These results are further fortified by anecdotal evidence from low oxalate dieters who drink coffee daily.

What Are Oxalates?

Oxalates are organic molecules found in a variety of plants and plant-based foods. Beets, nuts, vegetables, chocolate, cocoa, wheat bran, and seeds are among those foods that are rich in oxalate.

When you take oxalate in large amounts, commonly from high-oxalate meals, you’re susceptible to kidney stones and other medical issues. If you’ve ever wondered why so many people are interested in the oxalate level in coffee, then you understand why.

What Are Oxalate Sensitivity Symptoms?

Before lab testing established that oxalate sensitivity is genuine, there was a disagreement about whether it is. Some people felt it was just another imagination from dietitians until lab tests revealed it is. 

The oxalate sensitivity symptoms were only constant after some kidney stone patients ate certain meals. To be more specific, muscular aches, fibromyalgia symptoms, and excessive fatigue in the morning may show that you have trouble with oxalic acid molecules.

Should You Follow A Low-Oxalate Diet?

When you get too much oxalate or not enough fluid in your system, the oxalate binds to calcium and forms crystals, forming stones. 

The goal of a low-oxalate diet is to reduce your dietary oxalate consumption, reducing the amount of oxalate accessible for absorption in your intestine. 

This decreases the likelihood of calcium oxalate kidney stones by lowering oxalate levels in the urine. An acceptable oxalate consumption target is less than 100 mg per day, ideally less than 50 mg per day.

Some foods such as beans, berries, and spinach may raise oxalate amounts in the urine. When you avoid these items, the oxalate level of other foods will usually fall within the range suggested for stone formation.

How To Reduce Oxalates In Coffee & Other Beverages?

It’s still unclear if oxalate content in coffee is a cause for alarm. In the meantime, if your body is sensitive to this substance, using oxalate-reducing enzymes should significantly reduce the amount of this substance in all of your beverages and meals.

On the other hand, boiling your coffee beans thoroughly, at least for a few minutes longer, helps break the molecular bonds, allowing the coffee beans to excrete oxalates along with other undesirable minerals.

Additionally, you may want to limit other oxalate-rich foods, such as spinach and soy products, because the oxalate in these foods typically hangs around to develop kidney stones. 

However, if you can’t resist the urge to consume any of these foods, the oxalate enzyme will assist you in neutralizing the chemical.

When To Seek Medical Treatment For Oxalate-Sensitive People?

While many prove that the amount of oxalate in coffee isn’t an issue and that coffee binds oxalic acid to make excretion simpler, you might not want to rely on the beverage to solve your oxalate problems. 

Once you notice abnormal changes in your bladder or any of the symptoms listed above, consult a nutritionist or a doctor. You could also look for an oxalate specialist in your area and let them evaluate your current conditions.

How Much Coffee Should You Consume?

Research has shown that moderate coffee intake has exceptionally significant health benefits. We have known it to improve pupils’ short-term cognitive capacity. 

Current research suggests that drinking at least 4 cups of coffee per day for a long time may boost your IQ straight from the DNA base modification.

This amount of coffee also helps to activate the movement of a specific protein within mitochondria, which protects cardiac cells from harm. 

Furthermore, scientists have associated coffee intake with a decreased risk of illnesses such as gout, some cancer types, and depression, among others.

Most individuals with oxalate sensitivity problems are unsure if they should continue to drink coffee to enhance their cognitive production. The answer is that they should, but with the consent of your nutritionist at the very least.

Besides Oxalates, What Are Other Compounds In Coffee?

There are some other chemicals present in coffee while storing and processing the beans. Ochratoxin A (which may grow on unroasted coffee beans), acrylamide, and furan are formed during heat processing.

Coffee producers have taken steps to prevent the formation of Ochratoxin A and are constantly monitoring acrylamide and furan amounts in the final product.

Many researchers have looked at the impact of the chemicals produced in coffee which we summarize here.

Ochratoxin A

Ochratoxin A (OTA) is generated by mold that can develop in improperly stored coffee. 

Research has looked at probable links between OTA exposure and renal illness, bladder cancer, and hepatocellular carcinoma, however, no causal link between OTA and harmful consequences in people has been shown.


A scientific study published in June 2015 by the European Food Safety Authority (EFSA) concluded that acrylamide in food can increase the risk of cancer.

The thing is, the link between coffee consumption and cancer has not been proven. Cutting coffee out is unnecessary.


Furan in several foods and drinks, including baby food, morning cereals, and coffee, spontaneously develops when heating or boiling. 

This compound appears in coffee during roasting. 

According to several studies, furan levels appear to drop considerably during the brewing process since the molecule is extremely volatile and easy to evaporate.

The following are some of the health consequences linked to furan exposure in humans:

  • Chloracne, for example, is a skin condition that can lead to liver issues.
  • Some types of malignancies impairment of the immune system.
  • Impacts on the developing neurological system.

What Should You Do To Reduce The Risk Of Kidney Stone Formation?

Here are some other recommendations to help minimize the risk of kidney stones and improve your urinary health, besides a low-oxalate eating habit:

  • Drink 10 to 12 glasses of liquids (8 oz) each day, half of which should be water. When it’s hot outside, or you’re exercising, remember to drink plenty of water to keep you hydrated and dilute your pee.
  • Eat 5 to 9 portions of fruit and vegetables each day. Fiber, magnesium, phytate, and citrate, all of which are found naturally in fruits and vegetables, may aid in the prevention of kidney stones. If you use vitamin C supplements, don’t exceed 500mg per day since the human body converts vitamin C to oxalate.
  • Consume meat, fish, and fowl in moderation. A protein source the size of a deck of cards may provide your protein intake needs in 2-3 meals per day. 

Choosing plant-based sources of protein a few times a week might also be beneficial. A high protein diet can exacerbate kidney stone development.

  • Consume as little salt as possible. Instead of processed, convenient, and quick foods, go for fresh or frozen items instead of using salt shakers. If you choose, you can adopt the DASH diet.

Coffee Nutrition Information

Because black coffee lacks substantial amounts of the essential micronutrients, fat, and protein, it only provides 1-2 kcal per 100ml. Magnesium and niacin are among the micronutrients found in black coffee.

Many factors will influence the ultimate nutritional composition of a mug of coffee:

  • Different cup sizes may influence the nutritional content.
  • The content of additives such as milk, sugar, and cream may change the nutritional content and perhaps raise the calorie count.

FAQs Of Is Coffee High In Oxalates

1. What in coffee causes kidney stones?

The major components of coffee are caffeine and oxalate. When these two substances mix in your body, they create kidney stones. In fact, studies have shown that people who drink four or more cups of coffee a day have a 20% higher risk of developing kidney stones than those who don’t drink coffee.

2. Can I drink coffee if I have a kidney stone?

If you are struggling with kidney stones, you may be wondering if it is still safe for you to drink coffee. After all, coffee is known to be a diuretic, which could potentially exacerbate the problem.

However, there is no need to worry – a cup of coffee per day will not make your kidney stones worse. In fact, coffee may actually help to prevent kidney stones from forming in the first place.

3. Is oxalic acid in coffee?

Coffee contains oxalic acid, which is a naturally occurring compound found in many plants and vegetables. When coffee beans are roasted, the level of oxalic acid decreases. However, it is still present in brewed coffee.

4. Does coffee increase oxalates?

It is a common misconception that coffee increases oxalates. However, this is not the case. In fact, coffee contains very low levels of oxalates. The average cup of coffee has only about 5 mg of oxalate.

While coffee does not increase oxalates, it is important to remember that some people are more sensitive to oxalates than others. For these individuals, even small amounts of oxalate can cause problems. If you are sensitive to oxalates, you may want to avoid coffee or limit your intake.


Oxalate is an organic element in coffee, plants, and animals that we consume every day. So, is coffee high in oxalates? The oxalate quantity in coffee is not too much that you should be concerned about.

When you consume high amounts of oxalate, you risk developing kidney stones and other health problems. Therefore, reduce your oxalate intake by following a low-oxalate diet.

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